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Treatment of aniline-contaminated wastewater by sequencing biofilm batch reactor system under Micro-Aerobic condition

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Abstract

Sequencing biofilm batch reactor (SBBR) under micro-aerobic condition was applied to the treatment of aniline-contaminated wastewater in this study. Hydraulic retention time (HRT) of 12—36 h and dissolved oxygen (DO) concentration of 0.1—0.5 mg/L were selected as the operating variables to model, analyze and optimize the process. Five dependent parameters, aniline (AN), chemical oxygen demand (COD), ammonium, total nitrogen (TN) and total phosphorus (TP) removal efficiencies as the process responses, were studied. From the results, increase in DO concentration could promote the AN, COD and ammonium removal; increase in HRT could also lead to increase of the AN and ammonium removal, but might decrease COD removal due to endogenous respiration and soluble microbial products. In the SBBR system, 24 h for HRT and 0.5 mg/L for DO concentration were chosen as the optimum operating condition. The actual removal efficiencies of COD, AN and ammonium under the optimum operating condition were 98.37%, 100% and 89.29%, respectively. The experimental findings were in close agreement with the model prediction. The presence of glucose could promote bacterial growth and has positive influence on AN degradation and ammonium removal.

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Authors and Affiliations

  1. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, China

    Pei-shi Qi  (祁佩时), Hong-yi Chen  (陈洪一) & Yun-zhi Liu  (刘云芝)

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  1. Pei-shi Qi  (祁佩时)
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  2. Hong-yi Chen  (陈洪一)
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  3. Yun-zhi Liu  (刘云芝)
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Corresponding author

Correspondence to Pei-shi Qi  (祁佩时).

Additional information

Foundation item: the National Major Water Project of China (No. 2013ZX07201007), and the Fund supported by State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) (No. 2013DX06)

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Qi, Ps., Chen, Hy. & Liu, Yz. Treatment of aniline-contaminated wastewater by sequencing biofilm batch reactor system under Micro-Aerobic condition. J. Shanghai Jiaotong Univ. (Sci.) 20, 634–640 (2015). https://doi.org/10.1007/s12204-015-1670-3

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  • DOI: https://doi.org/10.1007/s12204-015-1670-3

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